TRT Calculator
Sleep Metrics Calculator
Normal Ranges
Sleep Efficiency≥ 85 %
Sleep Latency10 – 20 min
REM Latency90 – 120 min
WASO< 30 min
TRT = Lights On − Lights Out
Sleep Latency = Sleep Onset − Lights Out
TST = TRT − Sleep Latency − WASO
Sleep Efficiency = (TST ÷ TRT) × 100
Sleep Latency = Sleep Onset − Lights Out
TST = TRT − Sleep Latency − WASO
Sleep Efficiency = (TST ÷ TRT) × 100
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These calculations are intended as educational aids only. All clinical decisions must be made by qualified sleep professionals based on the complete polysomnography record.